AgentQnA: Fix erroneous link in the README (#775)

Signed-off-by: Lianhao Lu <[email protected]>

AgentQnA/README.md

@@ -103,4 +103,4 @@ curl http://${ip_address}:9090/v1/chat/completions -X POST -H "Content-Type: app
 
 ## How to register your own tools with agent
 
-You can take a look at the tools yaml and python files in this example. For more details, please refer to the "Provide your own tools" section in the instructions [here](https://github.com/minmin-intel/GenAIComps/tree/agent-comp-dev/comps/agent/langchain#-4-provide-your-own-tools).
+You can take a look at the tools yaml and python files in this example. For more details, please refer to the "Provide your own tools" section in the instructions [here](https://github.com/opea-project/GenAIComps/tree/main/comps/agent/langchain#5-customize-agent-strategy).